Recently upgraded my GTX 980 to a Vega 64. I used DDU to uninstall nvidia drivers and tried different Adrenalin versions. All in all I am pretty happy with the upgrade and running an all-AMD System now But it seems like Vega really don't like GTA. After fiddling around I ended up with settings that give me some decent results (e.g. turn off ingame vsync since it seems to cause stutter even though freesync is on). Apart from the fact that Vega performs poorly in GTA it seems like there is a bug with the reflection MSAA. If I turn it on, all the flickering disappears... but the paint turns matte also Any ideas or solutions?
Here is a video how it looks like: https://www.youtube.com/watch?v=Ot7MSiom9Rw
CPU: AMD Ryzen 7 1700X @ 4.0GHz (1.3V) @ custom loop
RAM: 16GB G.Skill Trident Z RGB 3200 CL14
Board: MSI X370 Gaming pro carbon
GPU: Sapphire RX Vega 64 Nitro + (Adrenalin 18.10.2)
SDD: Intenso 256GB